A couple times a day, and especially every early morning, I get Error 012 (flame loss) at my Navien NCB 240. I have to reset the boiler to make it work again. I have called the installer multiple times but the problem persists. Here is what I have done so far. All with installer and recommendations of Navien support hotline:
- usual maintenance with cleaning filters etc.
- replacement of ignition rod
- redid my entire chimney with brand new polypropylene exhaust and fresh air intake
The boiler was manufactured in 2013 and installed in 2014. It used to run without problems for a while and started to cause problems the last few months, although nothing was changed.
I hope to find someone who has some new ideas or who heard of a similar problem?
Thanks, I am at the point of desperation and am thinking of having to replace this brand new boiler.